Vibration detection device, detection method, device, medium and equipment

Abstract

The present disclosure relates to a vibration detection device, a detection method, a device, a medium and equipment, the vibration detection device comprising: a processing component, an optical fiber component, a reflection component and a strain component; the strain component is arranged at a to-be-detected position, the reflection component is fixed opposite to the strain component, a gap is left between the optical fiber component and the reflection component to form a Fabry-Perot interference cavity, and the processing component is connected to the optical fiber component; the strain component is used to sense vibration generated at the to-be-detected position, and deformation is generated based on the vibration, and a cavity length of the Fabry-Perot interference cavity changes based on the deformation of the strain component; the optical fiber component is used to emit a first optical signal to the reflection component, receive a second optical signal reflected by the reflection component, and transmit the first optical signal and the second optical signal to the processing component, and the second optical signal changes based on the change of the cavity length; and the processing component is used to determine whether the vibration is a target vibration based on the first optical signal and the second optical signal. In this way, the influence of electromagnetic interference is reduced.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of seismic monitoring, in particular to a vibration detection device, a detection method, a device, a medium and equipment. BACKGROUND

[0002] The microseismic detection system captures the vibration signal generated by the external force in the micro vibration, and converts it into the demodulated signal to realize the measurement of the energy, time and position of the vibration. The microseismic detection technology used by the system is widely used in seismic wave detection, oil and gas exploration, rock mass stability evaluation, bridge and tunnel structure detection and other occasions.

[0003] The existing system using this technology mostly uses a capacitive displacement sensor or a magnetic resistance displacement sensor, which is easy to be affected by electromagnetic interference during use, and the complex field environment and temperature change will also affect the system. Therefore, it is necessary to use a new scheme to detect the vibration signal while reducing electromagnetic interference. SUMMARY

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a vibration detection device, a detection method, a device, a medium and equipment.

[0005] In a first aspect, the present disclosure provides a vibration detection device, which comprises:

[0006] a processing component, an optical fiber component, a reflection component and a strain component;

[0007] The strain component is arranged at a to-be-measured position, the reflection component is relatively fixed between the strain component, and the optical fiber component is left with a gap between the reflection component to form a Fabry-Perot interference cavity, and the processing component is connected to the optical fiber component.

[0008] The strain component is used to sense the vibration generated at the to-be-measured position, and generates deformation based on the vibration, and the cavity length of the Fabry-Perot interference cavity changes based on the deformation of the strain component;

[0009] The optical fiber component is used to emit a first optical signal to the reflection component, receive a second optical signal reflected by the reflection component, and transmit the first optical signal and the second optical signal to the processing component, and the second optical signal changes based on the change of the cavity length;

[0010] The processing component is used to determine whether the vibration is a target vibration based on the first optical signal and the second optical signal.

[0011] Optionally, the strain component comprises an elastic sleeve.

[0012] Any position of the outer side wall of the elastic sleeve contacts the to-be-measured position, and any direction of the to-be-measured position generates vibration, and the elastic sleeve deforms;

[0013] The reflection component and the optical fiber component are both fixed to the inner side wall of the elastic sleeve.

[0014] Optionally, the optical fiber component includes a first optical fiber, a second optical fiber, a third optical fiber, and a fourth optical fiber.

[0015] The extension directions of the first optical fiber, the second optical fiber, the third optical fiber, and the fourth optical fiber all pass through the center of the cross section of the elastic sleeve, and the included angles between any two adjacent optical fibers of the first optical fiber, the second optical fiber, the third optical fiber, and the fourth optical fiber are the same.

[0016] The first optical signal includes a first component, a second component, a third component, and a fourth component.

[0017] The second optical signal includes a fifth component, a sixth component, a seventh component, and an eighth component.

[0018] The first optical fiber is configured to emit the first component to the reflection component, receive the fifth component reflected by the reflection component, and transmit the first component and the fifth component to the processing component.

[0019] The second optical fiber is configured to emit the second component to the reflection component, receive the sixth component reflected by the reflection component, and transmit the second component and the sixth component to the processing component.

[0020] The third optical fiber is configured to emit the third component to the reflection component, receive the seventh component reflected by the reflection component, and transmit the third component and the seventh component to the processing component.

[0021] The fourth optical fiber is configured to emit the fourth component to the reflection component, receive the eighth component reflected by the reflection component, and transmit the fourth component and the eighth component to the processing component.

[0022] The processing component is further configured to determine whether the vibration is a target vibration based on the first component, the second component, the third component, the fourth component, the fifth component, the sixth component, the seventh component, and the eighth component.

[0023] The cross section is a cross section perpendicular to the extension direction of the elastic sleeve.

[0024] Optionally, the first optical fiber, the second optical fiber, the third optical fiber, and the fourth optical fiber are located in the same cross section.

[0025] Optionally, the reflection assembly comprises a first reflection component, a second reflection component, a third reflection component and a fourth reflection component;

[0026] The first reflection component forms a first interference cavity with the first optical fiber, the second reflection component forms a second interference cavity with the second optical fiber, the third reflection component forms a third interference cavity with the third optical fiber, and the fourth reflection component forms a fourth interference cavity with the fourth optical fiber;

[0027] The first reflection component is configured to receive the first component and reflect the fifth component;

[0028] The second reflection component is configured to receive the second component and reflect the sixth component;

[0029] The third reflection component is configured to receive the third component and reflect the seventh component;

[0030] The fourth reflection component is configured to receive the fourth component and reflect the eighth component.

[0031] Optionally, the device further comprises a fixing component fixed to the inner wall of the elastic sleeve, the fixing component is configured to fix the first optical fiber, the second optical fiber, the third optical fiber, the fourth optical fiber, the first reflection component, the second reflection component, the third reflection component or the fourth reflection component, and maintain the first optical fiber, the second optical fiber, the third optical fiber and the fourth optical fiber in a preset shape.

[0032] Optionally, the fixing component comprises a V-shaped groove, the groove diameter of the V-shaped groove is the same as the outer diameter of the first optical fiber, the second optical fiber, the third optical fiber and the fourth optical fiber, and the V-shaped groove is fixed relative to the first optical fiber, the second optical fiber, the third optical fiber and the fourth optical fiber.

[0033] Optionally, the device further comprises a vertical cavity surface emitting laser light source;

[0034] The vertical cavity surface emitting laser light source is connected to the optical fiber assembly, the vertical cavity surface emitting laser light source emits the first optical signal to the optical fiber assembly, and the first optical signal is emitted to the reflection assembly through the optical fiber assembly.

[0035] Optionally, the processing assembly comprises an interferometer, a demodulator and a processor;

[0036] The interferometer is connected to the optical fiber assembly, the demodulator is connected to the interferometer, and the processor is connected to the demodulator;

[0037] The interferometer is configured to generate an interference signal based on the first optical signal and the second optical signal transmitted by the optical fiber assembly, the demodulator is configured to demodulate the interference signal and transmit the demodulated interference signal to the processor, and the processor is configured to determine whether the vibration is the target vibration based on the demodulated interference signal.

[0038] In a second aspect, the present disclosure also provides a detection method, which is implemented based on the apparatus of any one of the first aspect, and the method comprises:

[0039] obtaining a first optical signal and a second optical signal;

[0040] determining whether the vibration is the target vibration based on the first optical signal and the second optical signal.

[0041] Optionally, the determining whether the vibration is the target vibration based on the first optical signal and the second optical signal comprises:

[0042] determining whether the vibration is the target vibration based on a first number of interference fringes;

[0043] The interference fringes are fringes corresponding to an interference signal generated based on the first optical signal and the second optical signal.

[0044] Optionally, the method further comprises:

[0045] obtaining a temperature of the position to be measured;

[0046] determining an error amount of the cavity length based on the temperature;

[0047] determining a second number based on the error amount;

[0048] The determining whether the vibration is the target vibration based on the first optical signal and the second optical signal further comprises:

[0049] determining whether the vibration is the target vibration based on a difference between the first number and the second number;

[0050] The error amount is a cavity length change amount of the cavity length caused by the temperature, and the second number is a fringe number change amount of the interference fringes corresponding to the cavity length change amount.

[0051] In a third aspect, the present disclosure also provides a detection apparatus, which is implemented based on the apparatus of any one of the first aspect, and the apparatus comprises:

[0052] an obtaining module configured to obtain a first optical signal and a second optical signal;

[0053] A judging module is configured to judge whether the vibration is a target vibration based on the first optical signal and the second optical signal.

[0054] In a fourth aspect, the present disclosure further provides a computer readable storage medium storing a program or instructions, which causes a computer to perform the steps of the method according to any one of the second aspect.

[0055] In a fifth aspect, the present disclosure further provides an electronic device, comprising a processor and a memory.

[0056] The processor is configured to execute the steps of the method according to any one of the second aspect by invoking the program or instructions stored in the memory.

[0057] The present disclosure provides a vibration detection device, a detection method, a device, a medium and an electronic device. The vibration detection device comprises a processing component, an optical fiber component, a reflecting component and a strain component. The strain component is arranged at a to-be-detected position. The reflecting component is fixed relative to the strain component. The optical fiber component is spaced apart from the reflecting component to form a Fabry-Perot interference cavity. The processing component is connected to the optical fiber component. The strain component is configured to sense a vibration generated at the to-be-detected position and generate a deformation based on the vibration. A cavity length of the Fabry-Perot interference cavity changes based on the deformation of the strain component. The optical fiber component is configured to emit a first optical signal to the reflecting component, receive a second optical signal reflected by the reflecting component, and transmit the first optical signal and the second optical signal to the processing component. The second optical signal changes based on the change of the cavity length. The processing component is configured to judge whether the vibration is a target vibration based on the first optical signal and the second optical signal. Based on the above device, the present disclosure transmits an optical signal through the optical fiber component. The deformation of the strain component causes the change of the cavity length of the Fabry-Perot interference cavity. The vibration is judged to be a target vibration based on the second optical signal and the first optical signal. In other words, the target vibration is actually detected through the optical signal. Compared with the existing scheme of detecting the target vibration through an electrical signal, the optical signal in the present disclosure is not affected by electromagnetic interference and the like. In other words, the technical scheme provided by the present disclosure solves the problems of the existing scheme that the electrical signal may be subject to electric leakage, electromagnetic interference and lightning strike. In addition, compared with the electrical signal in the traditional scheme, the optical signal is easier to realize long-distance transmission, and thus the difficulty of remote detection is lower. BRIEF DESCRIPTION OF DRAWINGS

[0058] Figure 1 A first vibration detection device structure schematic diagram is provided for the embodiments of the present disclosure.

[0059] Figure 2 A second vibration detection device structure schematic diagram is provided for the embodiments of the present disclosure.

[0060] Figure 3A third vibration detection device structure schematic diagram is provided for the embodiment of the present disclosure.

[0061] Figure 4 A detection method flowchart is provided for the embodiment of the present disclosure.

[0062] Figure 5 A detection device structure schematic diagram is provided for the embodiment of the present disclosure.

[0063] Figure 6 A structure schematic diagram of an electronic device is provided for the embodiment of the present disclosure. DETAILED DESCRIPTION

[0064] In order to enable a more clear understanding of the above-mentioned purposes, features and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0065] In the following description, many specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure can also be implemented in other ways different from those described herein; obviously, the embodiments in the description are only some of the embodiments of the present disclosure, not all the embodiments.

[0066] The vibration detection device, detection method, device, medium and equipment provided by the embodiments of the present disclosure will be exemplarily described below in combination with the drawings.

[0067] Figure 1 A first vibration detection device structure schematic diagram is provided for the embodiment of the present disclosure, and the device comprises:

[0068] The processing component 11, the optical fiber component 12, the reflection component 13 and the strain component 14;

[0069] The strain component 14 is arranged at a to-be-detected position, the reflection component 13 is relatively fixed with the strain component 14, a gap is left between the optical fiber component 12 and the reflection component 13 to form a Fabry-Perot interference cavity, and the processing component 11 is connected with the optical fiber component 12;

[0070] The strain component 14 is used for sensing the vibration generated at the to-be-detected position, and a deformation is generated based on the vibration, and a cavity length of the Fabry-Perot interference cavity changes based on the deformation of the strain component 14;

[0071] The optical fiber component 12 is used for emitting a first light signal to the reflection component 13, receiving a second light signal reflected by the reflection component 13, and transmitting the first light signal and the second light signal to the processing component 11, and the second light signal changes based on the change of the cavity length;

[0072] The processing component 11 is used for judging whether the vibration is a target vibration based on the first light signal and the second light signal.

[0073] Specifically, the processing component 11 represents a component (or device) for processing the first optical signal and the second optical signal, and determining whether the detected vibration is the target vibration based on the first optical signal and the second optical signal; the optical fiber component 12 represents a component for transmitting the optical signal, which can only include an optical fiber, or can include other devices related to the transmission of the optical signal, which is not limited here; the reflecting component 13 represents a component for reflecting the optical signal, after the optical fiber component 12 emits the first optical signal to the reflecting component 13, the reflecting component 13 reflects the second optical signal and transmits it to the optical fiber component 12, and the optical fiber component 12 transmits the first optical signal and the second optical signal to the processing component 11 for processing; the strain component 14 represents a component for sensing the vibration generated by the outside world, after sensing the vibration, the strain component generates deformation, and the reflecting component 13 is fixed relative to the strain component 14, so when the strain component 14 generates deformation, the pose of the reflecting component 13 changes, and the cavity length of the Fabry-Perot interference cavity formed between the optical fiber component 12 and the reflecting component 13 changes accordingly, and the reflected second optical signal changes accordingly, and the processing component 11 determines whether the detected vibration is the target vibration based on the change of the second optical signal relative to the first optical signal; for example, the change amount of the cavity length can be determined based on the wavelength of the second optical signal, and when the change amount of the cavity length is greater than a certain change amount threshold, it is determined that the detected vibration is the target vibration. Figure 1 In the above process, the vibration is detected by the optical signal, and the propagation signal is also transmitted by the optical fiber component, that is, the optical signal is actually propagated by the optical fiber, so the part of the component (for example, the reflecting component 13 and the strain component 14) for detecting the vibration can be placed at the position to be detected, and the processing component 11 can be connected to a remote position through the optical fiber component 12, for example, the processing component is set at a position 100 kilometers away from the position to be detected, that is, remote detection is realized, and in the process of remote detection, since the optical signal is detected and the optical signal is transmitted, it will not be affected by external electromagnetic interference.

[0074] In some embodiments, the vibration can be caused by the ground stress generated by the earthquake, or can be caused by other reasons, and in this embodiment, the target vibration can be the vibration caused by the ground stress generated by the earthquake, but it should be noted that although the ground stress generated by the earthquake is taken as an example in the above embodiment and the background art, it is obvious that the embodiment of the present disclosure can not only be applied to detect earthquakes, but also can detect other vibrations.

[0075] Based on the above device, the present disclosure transmits the optical signal through the optical fiber assembly, and the change in the cavity length of the Fabry-Perot interference cavity is caused by the deformation of the strain assembly, and whether the vibration is the target vibration is judged based on the second optical signal and the first optical signal, that is, the target vibration is actually detected through the optical signal, compared with the existing scheme of detecting the target vibration through the electrical signal, the optical signal in the present disclosure will not be affected by electromagnetic interference and the like; that is, the technical scheme provided by the present disclosure solves the problems that the electrical signal in the existing scheme may be electrified, is easily affected by electromagnetic interference, is affected by lightning and the like; in addition, the optical signal is easier to realize long-distance propagation than the electrical signal in the traditional scheme, so the difficulty of realizing remote detection is lower.

[0076] Figure 2 A second vibration detection device structure schematic diagram is provided for the embodiment of the present disclosure, referring to Figure 2 In some embodiments, the strain assembly 14 includes an elastic sleeve.

[0077] The outer side wall of the elastic sleeve contacts the to-be-detected position at any position, and the elastic sleeve deforms when the to-be-detected position vibrates in any direction.

[0078] The reflection assembly 13 and the optical fiber assembly 12 are both fixed to the inner side wall of the elastic sleeve.

[0079] Specifically, the elastic sleeve can be a cylindrical structure, and the side wall thereof is made of elastic material and deforms after being subjected to an external force, so the elastic sleeve can be a stainless steel strain sleeve; taking the detected ground stress as an example, the elastic sleeve can be arranged in a borehole of the earth crust (i.e., the to-be-detected position) and fixed to the bedrock by pouring concrete, that is, all positions (or regions) of the side wall of the elastic sleeve directly or indirectly contact the bedrock, so that the elastic sleeve is subjected to a force when the to-be-detected position vibrates in any direction, thereby causing the deformation of the elastic sleeve; after the deformation of the elastic sleeve, the emission assembly fixed to the elastic sleeve changes in pose, and the cavity length of the Fabry-Perot interference cavity changes accordingly, and the second optical signal changes accordingly.

[0080] Through the above device, vibration in any direction can be detected.

[0081] Figure 3 A third vibration detection device structure schematic diagram is provided for the embodiment of the present disclosure, referring to Figure 3 In some embodiments, the optical fiber assembly 12 includes a first optical fiber 121, a second optical fiber 122, a third optical fiber 123, and a fourth optical fiber 124.

[0082] The extending directions of the first optical fiber 121, the second optical fiber 122, the third optical fiber 123 and the fourth optical fiber 124 all pass through the center of the cross section of the elastic sleeve, and the included angles between any two adjacent optical fibers among the first optical fiber 121, the second optical fiber 122, the third optical fiber 123 and the fourth optical fiber 124 are the same;

[0083] The first optical signal includes a first component, a second component, a third component and a fourth component;

[0084] The second optical signal includes a fifth component, a sixth component, a seventh component and an eighth component;

[0085] The first optical fiber 121 is configured to emit the first component to the reflection assembly 13, receive the fifth component reflected by the reflection assembly 13, and transmit the first component and the fifth component to the processing assembly 11;

[0086] The second optical fiber 122 is configured to emit the second component to the reflection assembly 13, receive the sixth component reflected by the reflection assembly 13, and transmit the second component and the sixth component to the processing assembly 11;

[0087] The third optical fiber 123 is configured to emit the third component to the reflection assembly 13, receive the seventh component reflected by the reflection assembly 13, and transmit the third component and the seventh component to the processing assembly 11;

[0088] The fourth optical fiber 124 is configured to emit the fourth component to the reflection assembly 13, receive the eighth component reflected by the reflection assembly 13, and transmit the fourth component and the eighth component to the processing assembly 11;

[0089] The processing assembly 11 is further configured to determine whether the vibration is the target vibration based on the first component, the second component, the third component, the fourth component, the fifth component, the sixth component, the seventh component and the eighth component;

[0090] The cross section is a cross section perpendicular to the extending direction of the elastic sleeve.

[0091] Continuing to refer to Figure 3 In some embodiments, the reflection assembly 13 includes a first reflection component 131, a second reflection component 132, a third reflection component 133 and a fourth reflection component 134;

[0092] The first reflection component 131 forms a first interference cavity with the first optical fiber 121, the second reflection component 132 forms a second interference cavity with the second optical fiber 122, the third reflection component 133 forms a third interference cavity with the third optical fiber 123, and the fourth reflection component 134 forms a fourth interference cavity with the fourth optical fiber 124;

[0093] The first reflection component 131 is configured to receive the first component and reflect the fifth component;

[0094] The second reflecting member 132 is configured to receive the second component and reflect a sixth component;

[0095] The third reflecting member 133 is configured to receive the third component and reflect a seventh component;

[0096] The fourth reflecting member 134 is configured to receive the fourth component and reflect an eighth component.

[0097] Specifically, the four interference cavities can be formed by the first optical fiber 121, the second optical fiber 122, the third optical fiber 123, the fourth optical fiber 124, the first reflecting member 131, the second reflecting member 132, the third reflecting member 133 and the fourth reflecting member 134, i.e., by the four-component method to determine whether the detected vibration is the target vibration, i.e., whether the detected vibration is the vibration caused by the target stress. Figure 3 In some scenarios, the first optical fiber 121 emits the first component to the first reflecting member 131, the first reflecting member 131 reflects the fifth component to the first optical fiber 121, the second optical fiber 122 emits the second component to the second reflecting member 132, the second reflecting member 132 reflects the sixth component to the second optical fiber 122, the third optical fiber 123 emits the third component to the third reflecting member 133, the third reflecting member 133 reflects the seventh component to the third optical fiber 123, the fourth optical fiber 124 emits the fourth component to the fourth reflecting member 134, and the fourth reflecting member 134 reflects the eighth component to the fourth optical fiber 124. For the sake of simplicity, the propagation direction of the optical signal is not shown in the figure, but it should be understood that the propagation direction (or path) of the optical signal can be clearly derived by those skilled in the art from the above description. The included angle between the first optical fiber 121, the second optical fiber 122, the third optical fiber 123 and the fourth optical fiber 124 is 45°. The first optical fiber 121 can transmit the first component and the fifth component to the processing assembly 11, the second optical fiber 122 can transmit the second component and the sixth component to the processing assembly 11, the third optical fiber 123 can transmit the third component and the seventh component to the processing assembly 11, and the fourth optical fiber 124 can transmit the fourth component and the eighth component to the processing assembly 11. The processing assembly 11 can determine whether the detected vibration is the target vibration based on the first component, the second component, the third component, the fourth component, the fifth component, the sixth component, the seventh component and the eighth component; for example, the amount of change in the cavity length of the first interference cavity can be determined based on the first component and the fifth component, the amount of change in the cavity length of the second interference cavity can be determined based on the second component and the sixth component, the amount of change in the cavity length of the third interference cavity can be determined based on the third component and the seventh component, and the amount of change in the cavity length of the fourth interference cavity can be determined based on the fourth component and the eighth component, and then whether the detected vibration is the target vibration, i.e., whether the detected vibration is actually the vibration caused by the target stress, can be determined based on the average or maximum of the amount of change in the cavity length of the first interference cavity, the amount of change in the cavity length of the second interference cavity, the amount of change in the cavity length of the third interference cavity and the amount of change in the cavity length of the fourth interference cavity.

[0098] In some embodiments, the first reflecting member 131, the second reflecting member 132, the third reflecting member 133 and the fourth reflecting member 134 can be coated metal mirrors, which have the characteristics of moisture resistance, anti-fogging and long service life.

[0099] In some scenarios, the above device actually only uses 4 optical fibers, i.e., 4 single-mode optical fibers, and 1 optical cable can accommodate 144 single-mode optical fibers, so in a sense, one optical fiber assembly 12 can include 144 single-mode optical fibers, the 4 optical fibers in the reflecting assembly 13, the strain assembly 14 and the optical fiber assembly 12 form a detection terminal, and only 4 optical fibers in the optical fiber assembly 12 are occupied, so one processing assembly 11 and one optical fiber assembly 12 can be connected to 36 detection terminals at the same time, and the simultaneous detection of 36 to-be-measured positions can be realized.

[0100] Continuing to refer to Figure 3 In some embodiments, the processing assembly 11 includes an interferometer 111, a demodulator 112 and a processor 113; the interferometer 111 is connected to the optical fiber assembly 12, the demodulator 112 is connected to the interferometer 111, and the processor 113 is connected to the demodulator 112; the interferometer 111 is used to generate an interference signal based on the first optical signal and the second optical signal transmitted by the optical fiber assembly 12, the demodulator 112 is used to demodulate the interference signal and transmit the demodulated interference signal to the processor 113, and the processor 113 is used to determine whether the vibration is the target vibration based on the demodulated interference signal.

[0101] Specifically, after receiving the first component, the second component, the third component, the fourth component, the fifth component, the sixth component, the seventh component and the eighth component, the interferometer 111 can interfere the first component and the fifth component, the second component and the sixth component, the third component and the seventh component, and the fourth component and the eighth component respectively to obtain a first interference signal after interference of the first component and the fifth component, a second interference signal after interference of the second component and the sixth component, a third interference signal after interference of the third component and the seventh component, and a fourth interference signal after interference of the fourth component and the eighth component; the demodulator 112 demodulates the first interference signal, the second interference signal, the third interference signal and the fourth interference signal and transmits them to the processor 113; the processor analyzes the demodulated first interference signal, the second interference signal, the third interference signal and the fourth interference signal, and determines a first change amount of interference fringes of the first interference signal, a second change amount of interference fringes of the second interference signal, a third change amount of interference fringes of the third interference signal and a fourth change amount of interference fringes of the fourth interference signal; the above-mentioned first change amount, the second change amount, the third change amount and the fourth change amount are obtained based on the number of interference fringes before the strain assembly 14 deforms; taking the first change amount as an example, when the strain assembly 14 deforms, the number of interference fringes of the interference signal generated by the first component and the fifth component is a, and after the strain assembly 14 deforms, the number of interference fringes of the interference signal generated by the first component and the fifth component is b, then the first change amount can be a-b, and the others are the same, which will not be described here.

[0102] Suppose the first change amount is S1, the second change amount is S2, the third change amount is S3, and the fourth change amount is S4, then based on the settings in the above-mentioned device, the included angle between any two adjacent optical fibers is 45°, and there are:

[0103] S1=A(ε1+ε2)+B(ε1-ε2)cos2(Ψ) (1)

[0104] S2=A(ε1+ε2)+B(ε1-ε2)cos2(Ψ+45°) (2)

[0105] S3=A(ε1+ε2)+B(ε1-ε2)cos2(Ψ+90°) (3)

[0106] S4=A(ε1+ε2)+B(ε1-ε2)cos2(Ψ+135°) (4)

[0107] Wherein, S1, S2, S3 and S4 are respectively the first change, the second change, the third change and the fourth change, that is, the change of the interference fringes of the first interference signal with time, the change of the interference fringes of the second interference signal with time, the change of the interference fringes of the third interference signal with time, and the change of the interference fringes of the fourth interference signal with time; ε1 and ε2 represent the maximum principal strain and the minimum principal strain of the position to be measured respectively; A represents the surface strain sensitivity coefficient, B represents the shear strain sensitivity coefficient, A and B are both constants, and the specific values of A and B can be obtained by theoretical or experimental methods; and Ψ represents the maximum principal strain orientation angle, which is taken as 0°. Figure 3 For example, Figure 3 The light corresponding to the three o'clock direction in the above formula (1)-(4) has the following corresponding relationship:

[0108] In the above formula (1)-(4), there is the following corresponding relationship:

[0109] (ε1+ε2)1=(U1+U3)÷2A (5)

[0110] (ε1+ε2)2=(U2+U4)÷2A (6)

[0111] Based on the above formula (5) and formula (6), when U1, U3, U2 and U4 change, (ε1+ε2)1 and (ε1+ε2)2 change accordingly; the change relationship curve of (ε1+ε2)1 with time and the change relationship curve of (ε1+ε2)1 with time can be determined, and whether the detected vibration is the target vibration is judged based on the changes of (ε1+ε2)1 and (ε1+ε2)1 within a period of time, that is, whether the detected vibration is the vibration caused by the target stress in fact, if the change amount within a certain time T exceeds a certain first change threshold, it is determined that the detected vibration is the target vibration, thus achieving the purpose of detecting the ground stress.

[0112] In addition, it can also be judged according to the following formula:

[0113] U1+U3 (7)

[0114] U2+U4 (8)

[0115] That is, whether the detected vibration is the target vibration is judged according to the above formula (7) and (8), that is, the change relationship curve of U1+U3 with time and the change relationship curve of U2+U4 with time are also determined, if the change amount within a certain time T exceeds a certain second change threshold, it is determined that the detected vibration is the target vibration, thus achieving the purpose of detecting the ground stress.

[0116] In some embodiments, the first optical fiber 121, the second optical fiber 122, the third optical fiber 123 and the fourth optical fiber 124 are located in the same cross section.

[0117] By arranging the first optical fiber 121, the second optical fiber 122, the third optical fiber 123 and the fourth optical fiber 124 in the same cross section, the length of the elastic sleeve can be reduced, i.e. the volume of the strain assembly 14 can be reduced in practice.

[0118] In some embodiments, the device further comprises a fixing member 15 fixed to the inner side wall of the elastic sleeve, the fixing member 15 being used to fix the first optical fiber 121, the second optical fiber 122, the third optical fiber 123, the fourth optical fiber 124, the first reflecting member 131, the second reflecting member 132, the third reflecting member 133 or the fourth reflecting member 134, and to keep the first optical fiber 121, the second optical fiber 122, the third optical fiber 123 and the fourth optical fiber 124 in a preset shape.

[0119] In some embodiments, the fixing member 15 comprises a V-shaped groove, the groove diameter of the V-shaped groove being the same as the outer diameter of the first optical fiber 121, the second optical fiber 122, the third optical fiber 123 and the fourth optical fiber 124, and the V-shaped groove being relatively fixed with the first optical fiber 121, the V-shaped groove being relatively fixed with the second optical fiber 122, the V-shaped groove being relatively fixed with the third optical fiber 123, and the V-shaped groove being relatively fixed with the fourth optical fiber 124.

[0120] Continuing to refer to Figure 3 , the fixing member 15 can be a rib, in some embodiments, the elastic sleeve and the rib can use a material with a small temperature expansion coefficient, i.e. the deformation amount of the elastic sleeve and the rib is less affected by temperature changes, and the elastic sleeve can also use a rubber plug for sealing to isolate the moisture flow. And since the optical fiber is used to transmit the optical signal, the influence of the external environment on the optical signal is small, thus effectively increasing the sensitivity and accuracy of the detection. The V-shaped groove can firmly fix the optical fiber in the V-shaped groove, in addition, the optical fiber can also be firmly adhered to the corresponding rib by a rigid adhesive, and there is no relative sliding between the V-shaped groove and the optical fiber.

[0121] Continuing to refer to Figure 3 , in some embodiments, the device further comprises a vertical cavity surface emitting laser light source 16; the vertical cavity surface emitting laser light source 16 is connected to the optical fiber assembly 12, the vertical cavity surface emitting laser light source 16 emits a first optical signal to the optical fiber assembly 12, and the first optical signal is emitted to the reflecting assembly 13 through the optical fiber assembly 12. In addition, the device further comprises a circulator 17, which separates the first optical signal emitted by the vertical cavity surface emitting laser light source 16 and the second optical signal reflected by the reflecting assembly 13.

[0122] Specifically, the vertical cavity surface emitting laser light source 16 has a lower threshold current, can output a circular light spot, and has a small divergence angle, facilitating the formation of a two-dimensional surface array in the interference cavity.

[0123] Figure 4 A detection method flowchart is provided for the embodiments of the present disclosure, which is implemented based on the device of any of the above vibration detection device embodiments, and the method comprises:

[0124] S401, acquiring a first optical signal and a second optical signal;

[0125] S402, determining whether the vibration is a target vibration based on the first optical signal and the second optical signal.

[0126] Specifically, the method for determining whether the detected vibration is a target vibration based on the first optical signal and the second optical signal has been described in detail in the above vibration detection device embodiments, and will not be repeated here. Since this method is implemented based on the above device, the same technical effects as the above device can be achieved.

[0127] In some embodiments, S402 can include:

[0128] determining whether the vibration is a target vibration based on the first number of interference fringes;

[0129] The interference fringes are fringes corresponding to the interference signal generated based on the first optical signal and the second optical signal.

[0130] Specifically, in some embodiments, the first number of interference fringes can be directly used to determine whether the vibration is a target vibration. For example, the first number is c, and the number threshold is d. The difference or ratio between c and d can be determined. If the difference is greater than or equal to a certain difference threshold or the ratio is greater than or equal to a certain ratio threshold, it can be determined that the vibration is a target vibration.

[0131] In some embodiments, the method further comprises:

[0132] acquiring the temperature of the to-be-measured position;

[0133] determining the error amount of the cavity length based on the temperature;

[0134] determining the second number based on the error amount;

[0135] determining whether the vibration is a target vibration based on the first optical signal and the second optical signal further comprises:

[0136] determining whether the vibration is a target vibration based on the difference between the first number and the second number;

[0137] Wherein, the error amount is a cavity length change amount caused by the cavity length affected by the temperature, and the second amount is a change amount of the interference fringe number corresponding to the cavity length change amount.

[0138] Specifically, in order to more accurately determine whether the detected vibration is the target vibration, the interference of temperature can also be excluded; in some scenarios, the temperature change of the to-be-measured position will also cause a certain deformation of the strain component 14, which will inevitably cause a certain impact on the number of interference fringes, for example, under ideal temperature conditions, under the premise that the strain component 14 is not affected by external vibration, the first number of interference fringes of the interference signal is e; and after the temperature changes, the number of interference fringes increases by f, that is, the second number is f, that is, the first number of interference fringes becomes e+f; therefore, the influence of temperature needs to be excluded, and whether the vibration is the target vibration is determined according to the difference between the first number and the second number, that is, according to (e+f)-f; in some scenarios, the number of interference fringes is not necessarily increased, but also can be reduced, so in some scenarios, whether the vibration is the target vibration can also be determined according to the sum of the first number and the second number, which will not be described here.

[0139] Through the above method, the influence of temperature can be excluded, and whether the detected vibration is the target vibration can be more accurately determined, that is, whether the detected vibration is the vibration caused by the target stress can be accurately determined.

[0140] Figure 5 A detection device structure schematic diagram provided by the embodiment of the present disclosure, the device is realized based on the device of any one of the above vibration detection device embodiments, and the device comprises:

[0141] The acquisition module 51 is configured to acquire the first optical signal and the second optical signal.

[0142] The determination module 52 is configured to determine whether the vibration is the target vibration based on the first optical signal and the second optical signal.

[0143] The detection device provided by the embodiment of the present disclosure is realized based on the device of any one of the above vibration detection device embodiments, and therefore can achieve the same technical effects as the above vibration detection device.

[0144] The embodiment of the present disclosure also provides a computer-readable storage medium, which stores programs or instructions, and the programs or instructions make the computer execute the steps of any one of the methods provided by the above embodiments.

[0145] In some embodiments, the computer executable instructions, when executed by the computer processor, can also be used to execute the technical solutions of the above vibration detection method provided by the embodiment of the present disclosure, and realize the corresponding beneficial effects.

[0146] The electronic device provided by the embodiments of the present disclosure also includes a processor and a memory. The processor is configured to execute the steps of any of the methods provided by the above embodiments by invoking programs or instructions stored in the memory, so as to achieve the corresponding beneficial effects.

[0147] Figure 6 A structural schematic diagram of an electronic device provided by the embodiments of the present disclosure is shown in FIG. 6. As shown in FIG. 6, the electronic device includes one or more processors 601 and a memory 602. Figure 6

[0148] The processor 601 can be a central processing unit (CPU) or other forms of processing units having data processing and / or instruction execution capabilities, and can control other components in the electronic device to perform desired functions.

[0149] The memory 602 can include one or more computer program products, which can include various forms of computer readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory can include, for example, random access memory (RAM), cache memory, and / or the like. The non-volatile memory can include, for example, read-only memory (ROM), hard disk, flash memory, and / or the like. One or more computer program instructions can be stored in the computer readable storage media, and the processor 601 can run the program instructions to implement the methods of the embodiments of the present disclosure described above, and / or other desired functions. Various contents such as input signals, signal components, noise components, and the like can also be stored in the computer readable storage media.

[0150] In one example, the electronic device can also include an input device 603 and an output device 604, which are interconnected through a bus system and / or other forms of connection mechanism (not shown).

[0151] In addition, the input device 603 can also include, for example, a keyboard, a mouse, and the like.

[0152] The output device 604 can output various information to the outside, including the determined distance information, direction information, and the like. The output device 604 can include, for example, a display, a speaker, a printer, a communication network and a remote output device connected thereto, and the like.

[0153] Of course, in order to simplify, Figure 6 only some of the components related to the present disclosure in the electronic device are shown, and components such as buses, input / output interfaces, and the like are omitted. In addition, the electronic device can also include any other appropriate components according to specific application cases.

[0154] ​It is to be noted that, in the present text, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the term "comprises" or any other variant thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises a" does not exclude the existence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0155] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the relevant technical features without deviating from the principles of the present application, and the technical solutions after these changes or replacements will all fall within the protection scope of the present application.

Claims

1. A vibration detection device, characterized in that, The device includes: Processing components, fiber optic components, reflection components, and strain components; The strain component is positioned at the test location, the reflection component is fixed relative to the strain component, and a gap is left between the optical fiber component and the reflection component to form a Fabry-Perot interferometer cavity. The processing component is connected to the optical fiber component. The strain gauge is used to sense the vibration generated at the test location and to deform based on the vibration. The cavity length of the Fabry-Perot interferometer changes based on the deformation of the strain gauge. The strain gauge includes an elastic sleeve. Any position on the outer sidewall of the elastic sleeve contacts the test location. Vibration occurs in any direction at the test location, and the elastic sleeve deforms accordingly. The reflection component and the optical fiber component are both fixed to the inner sidewall of the elastic sleeve. The optical fiber assembly is used to transmit a first optical signal to the reflective assembly, receive a second optical signal reflected by the reflective assembly, and transmit the first optical signal and the second optical signal to the processing assembly, wherein the second optical signal changes based on the change in cavity length; The processing component is used to determine whether the vibration is the target vibration based on the first optical signal and the second optical signal.

2. The apparatus according to claim 1, characterized in that, The optical fiber assembly includes a first optical fiber, a second optical fiber, a third optical fiber, and a fourth optical fiber; The first, second, third, and fourth optical fibers all extend through the center of the cross-section of the elastic sleeve, and the included angle between any two adjacent optical fibers is the same. The first optical signal includes a first component, a second component, a third component, and a fourth component; The second optical signal includes a fifth component, a sixth component, a seventh component, and an eighth component; The first optical fiber is used to transmit the first component to the reflective component, receive the fifth component reflected by the reflective component, and transmit the first component and the fifth component to the processing component. The second optical fiber is used to transmit the second component to the reflective component, receive the sixth component reflected by the reflective component, and transmit the second component and the sixth component to the processing component; The third optical fiber is used to transmit the third component to the reflective component, receive the seventh component reflected by the reflective component, and transmit the third component and the seventh component to the processing component. The fourth optical fiber is used to transmit the fourth component to the reflective component, receive the eighth component reflected by the reflective component, and transmit the fourth component and the eighth component to the processing component. The processing component is further configured to determine whether the vibration is a target vibration based on the first component, the second component, the third component, the fourth component, the fifth component, the sixth component, the seventh component, and the eighth component; Wherein, the cross section is a cross section perpendicular to the extension direction of the elastic sleeve.

3. The apparatus according to claim 2, characterized in that, The first optical fiber, the second optical fiber, the third optical fiber, and the fourth optical fiber are located within the same cross section.

4. The apparatus according to claim 2, characterized in that, The reflective assembly includes a first reflector, a second reflector, a third reflector, and a fourth reflector; The first reflector and the first optical fiber form a first interference cavity, the second reflector and the second optical fiber form a second interference cavity, the third reflector and the third optical fiber form a third interference cavity, and the fourth reflector and the fourth optical fiber form a fourth interference cavity; The first reflector is used to receive the first component and reflect the fifth component; The second reflector is used to receive the second component and reflect the sixth component; The third reflector is used to receive the third component and reflect the seventh component; The fourth reflector is used to receive the fourth component and reflect the eighth component.

5. The apparatus according to claim 4, characterized in that, The device further includes a fixing member, which is fixed to the inner sidewall of the elastic sleeve. The fixing member is used to fix the first optical fiber, the second optical fiber, the third optical fiber, the fourth optical fiber, the first reflector, the second reflector, the third reflector, or the fourth reflector, and to maintain the first optical fiber, the second optical fiber, the third optical fiber, and the fourth optical fiber in a preset shape.

6. The apparatus according to claim 5, characterized in that, The fixing component includes a V-groove, the diameter of which is the same as the outer diameter of the first optical fiber, the second optical fiber, the third optical fiber, and the fourth optical fiber, and the V-groove is fixed relative to the first optical fiber, the second optical fiber, the third optical fiber, and the fourth optical fiber.

7. The apparatus according to claim 1, characterized in that, The device also includes a vertical cavity surface-emitting laser source; The vertical cavity surface-emitting laser source is connected to the optical fiber assembly. The vertical cavity surface-emitting laser source emits the first optical signal into the optical fiber assembly, and the first optical signal is emitted to the reflective assembly through the optical fiber assembly.

8. The apparatus according to claim 1, characterized in that, The processing components include an interferometer, a demodulator, and a processor; The interferometer is connected to the optical fiber assembly, the demodulator is connected to the interferometer, and the processor is connected to the demodulator; The interferometer is used to generate an interference signal based on the first optical signal and the second optical signal transmitted by the optical fiber assembly. The demodulator is used to demodulate the interference signal and transmit the demodulated interference signal to the processor. The processor is used to determine whether the vibration is the target vibration based on the demodulated interference signal.

9. A detection method, characterized in that, The method is implemented based on the apparatus described in any one of claims 1-8, and the method includes: Acquire the first optical signal and the second optical signal; The vibration is determined to be the target vibration based on the first optical signal and the second optical signal.

10. The method according to claim 9, characterized in that, The step of determining whether the vibration is a target vibration based on the first optical signal and the second optical signal includes: The vibration is determined as a target vibration based on the first number of interference fringes. The interference fringes are fringes corresponding to the interference signals generated based on the first optical signal and the second optical signal.

11. The method according to claim 10, characterized in that, The method further includes: Obtain the temperature at the location to be measured; The error amount for determining the cavity length is based on the temperature; The second quantity is determined based on the error amount; The step of determining whether the vibration is a target vibration based on the first optical signal and the second optical signal further includes: The difference between the first quantity and the second quantity is used to determine whether the vibration is the target vibration; Wherein, the error quantity is the change in cavity length caused by the temperature, and the second quantity is the change in the number of interference fringes corresponding to the change in cavity length.

12. A detection device, characterized in that, The device is implemented based on the device as described in any one of claims 1-8, and the device comprises: The acquisition module is used to acquire the first optical signal and the second optical signal; The judgment module is used to determine whether the vibration is the target vibration based on the first optical signal and the second optical signal.

13. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a program or instructions that cause a computer to perform the steps of the method as described in any one of claims 9 to 11.

14. An electronic device, characterized in that, include: Processor and memory; The processor executes the steps of the method as described in any one of claims 9 to 11 by invoking programs or instructions stored in the memory.

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